The present disclosure provides a tear strip (100, 200) formed onto one or more wall panels (190) of a packaging blank (290) is provided. The tear strip includes one or more tear lines (110) configured onto at least one of the wall panels of the packaging blank and adapted to be cut there-through. Each of the one or more tear lines includes a first line of weakness (111) extending longitudinally between a proximal end towards a distal end and extends to a depth generally equal to an entire thickness of the packaging blank at the first line of weakness. The tear line further includes a second line of weakness (115) extending generally diagonally away from the first line of weakness in a direction away from a center of the tear strip and towards the distal end of the wall panel. The second line of weakness extends to a depth lesser than the entire thickness of the packaging blank. In operation, the tear strip may torn by pulling the one or more tear lines together such that a generally clean cut through a cross-section of the packaging blank is achieved at each of the first line of weakness and the second line of weakness.